Just when you thought the social calendar was approaching maximum capacity, enter the "kickoff." You know, the party before the party? One clear night in March, Bayou City A-listers raised their flutes in anticipation of UNICEF's Audrey Hepburn Society Ball, the Alley Theatre's "In the Groove" Ball and the Houston Grand Opera's Encore After-Party per a trio of glitzy River Oaks gatherings. Nothing like a cocktail soiree amuse-bouche to whet the appetite for the black-tie gala dinner.